General Physics news

Tractor beams come to life

Tractor beams, energy rays that can move objects, are a science fiction mainstay. But now they are becoming a reality -- at least for moving very tiny objects.

dateSep 08, 2010 in General Physics
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Before the Big Bang: A Twin Universe?

Until very recently, asking what happened at or before the Big Bang was considered by physicists to be a religious question. General relativity theory just doesn’t go there – at T=0, it spews out zeros, infinities, and ...

dateApr 09, 2008 in General Physics feature
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